GA – ESXi 5.0 Patch Release Date 27/09/2012

You can read the online version here. Please read the information carefully especially the KB which has some useful information related to this patch(Bug fix and security). To be honest, the patch mostly is to resolve some issues and the only enhancement that I’ve found:

PR896193: The VMGencounter generation ID is increased to 128-bit value to support specification changes from MSFT and also ACPI notification support is added.



vCenter Server Services Hang On Startup After Upgrading to vCenter Server 5.1

After upgrading to vCenter Server 5.1, the VMware VirtualCenter Server service displays as Starting and fails to complete the start of the service. The issue is caused by a key length mismatch between the vCenter Server certificate and the encrypted host passwords stored in the vCenter Server database. You need to run some SQL command to solve this issue. Refer to this VMware KB for more information.


vSphere Replication (VR) 5.1 is Unable to Recover Protected Virtual Machines

vSphere Replication 5.1 (VR) cannot recover protected virtual machines after the ESX host on the primary site is down, disconnected from the network, or its storage is not available. This is a known issue in VMware vSphere Replication 5.1. Currently, there is no resolution. Refer this VMware KB for more information.


VM with more than 32 snapshots

We sometime may overlook the very basic thing and because of this, it can caused you some hick up to your production environment. Same goes to me when I tried to reconfigure one of the ESXi host and suddenly a long error came out from nowhere “Cannot synchronize host dc2esx02. A general system occurred. Unexpected exception reading HTTP bla bla bla….”. To cut the story shot, what you have to do normally is to follow exactly what has been mentioned in this KB. I’ve done successfully a few cases before but luckily for this case, I don’t have to. Since the snapshots was back dated in Nov last year. I just need to delete all unused snapshot, modify some parameters in .vmsd file to “False”. Then, I’m able to reconfigured the HA or power on the VM without problem anymore.


What’s New in vSphere 5.1: Technical Marketing Documentation and White Paper

What’s new in VMware vSphere 5.1? Here is Technical Marketing Documentation and White Paper. More enhancements from previous version.

VMware vCenter 5.1
VMware vSphere 5.1 – Networking
VMware vSphere 5.1 – Platform
VMware vSphere 5.1 – Storage
VMware vSphere 5.1 – Performance
VMware vSphere Replication White Paper
VMware vSphere Data Protection White Paper
VMware vSphere Storage Appliance


ESXi boot tooks 2 hours

Problem suddenly happened after storage’s firmware has been upgraded and the bad thing was, Storage vendor failed to notice us early. Now pending on VMware Tech Support’s finding and the solution is far from over.



Seemed by marking “perennially reserved” on each RDM for devices participating MSCS clustering as recommended by this KB, the host finally able to boot with less than 6 minutes. Thanks VMware Tech.